全球排放标准日益严格,导致对发动机的要求也日益提高。为了应对新要求,开发了多种新型动力单元技术。因发动机参数不断发生变化,出现了更高的废气再循环率、更高的缸内最高燃烧压力、更低的机油黏度,以及更严重的机油污染和烟度状况。轴承的工作条件也已发生彻底改变,容易发生咬合现象,发动机与日俱增的复杂性刺激了对抗咬合轴承的需求。对于重型柴油机来说,动力单元的耐久性不应危及耐磨损性和抗疲劳性能。Mahle公司开发的用于溅镀轴承的聚合物涂层已被证明能够满足更高用途的需求。该聚合物涂层使溅镀层的抗咬合性能和耐磨损性相比常规铝锡溅镀层大大加强。在1台高性能重型柴油机上进行长时间的耐久试验,介绍新产品的台架试验和整机试验的详细结果。 The increasingly stringent global emission standards, resulting in an increasing demand for the engine. In response to the new requirements, a number of new power unit technologies have been developed. As engine parameters continue to change, higher EGR rates, higher maximum combustion pressures in the cylinders, lower oil viscosity, and more severe oil pollution and smoke levels have emerged. Bearing conditions have also been completely changed, prone to bite phenomenon, the increasing complexity of the engine to stimulate the demand for anti-bite bearings. For heavy duty diesel engines, the durability of the power unit should not compromise the wear and fatigue resistance. Polymer coatings developed by Mahle for sputtering bearings have proven to meet the needs of higher applications. The polymeric coating provides a substantial enhancement of the anti-seizure properties and wear resistance of the sputtered layers compared to conventional aluminum-tin sputters. A long-time durability test on a high-performance heavy-duty diesel engine introduces the detailed results of bench tests and machine tests on new products.